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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2912db1dbba40b2cd1d875b76034a3cd065060e9d043603a77b7e6298287c983' 
  AND token = '2s58nYt5Zosc8SYTsoytlqdBFHQeRBid62J+g3yS1n4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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