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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '48950e6dc6e027ac89a8fdfd1e1169d7d27662a511bbe37f093b60c8aae0611c' 
  AND token = '5LOTjr5Ey5OOpA4FLRRXQ2j4HLYMHLUp7FujNE2ndCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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