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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e319d842fc12965ac8b1b3048c00cce293b9508365d84e7e802c5e437696c1db' 
  AND token = 'PWwif7RjXxCQkHgfvX9eKkkc9oGdLFFcsXTtAEOGMFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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