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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '04a7180dcc0f256fb26f8c07fed5e3c3a4c94b385f0bf400f3de2c6fed1257f4' 
  AND token = 'w44k0yKeHNgqTLy7hEUeteWRZ18aO4CXF6TKTrRH9sg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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