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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '96e5cbc27a710b661134dc773d98158780840c3bafe8dcc04a5a558e59e7c9c5' 
  AND token = 'mkuxakPunO2AzqskR8cQ6nR5PB38oWw74dl74hCL8us=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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