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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80af57d108b323fe459474a3408f4a9848c2487b5c74f435aa45aa81965f5007' 
  AND token = 'V4Tcw7RQ0G4GdloUXpfOpHMCS3ebOOL5ZG64OmVe8nE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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