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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65d8d5f7a52ae462c21b364c20f95a5878872e60daa0f08b3e6e3fc2856138e6' 
  AND token = 'tYuSJu4eMMZzSy9l08SPajQ03xd0J1yRBYwPgu10Rm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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