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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d59d4dabaf52e8027a559e98ef01236e766ae5b1dbfa0a2a8469dfe02324c4b' 
  AND token = 'JinIzXP8BX1X/YL+F5yVaHNm36zupe2Hn2muqs00UFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}