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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4ab152902b4bdb71f929ecec6477fb5af2c882c26bed5f1843a982cf0286b983' 
  AND token = 'ap0M/onSbj6bDawIVSDg3ChL0Qc0rf7jNdJdiHFrpQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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