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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a81606f8f8a32592549d51f741bde28d02e636606c220494460a60f54a645f3' 
  AND token = 'xmm6sboQmXbCFrbvuIfQYvZgXK4gU9M7ylV/O7e/gfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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