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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f92137a90c3b3a523309578079fd8ac767fe09d19bdbe09f2f2bc1fb9b3ad093' 
  AND token = 'AEPNK7UDZij58HOdjqYR2esD29OjYWdt4LNDqLrayiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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