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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2643608313b576367682d39a8ad2cb2029f49620df445b2a695ee0b9f2fee998' 
  AND token = 'yfwqVxEWzuzQh/hKyX5Vb0X85Raz/EWh8J2x9ANc8fg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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