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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '925c6b2fec2447363ed12a0e166bc9daa3ecfab6cd29e4616d401e9e0b9610a3' 
  AND token = 'm8nuShvNo4JIIiOZxnyKnhoZ1gkMmSdy5XXmnvbet0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}