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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59234c068f42e1ebeb8c78b93644145b73dccc8e7ca13c2d427bc2191e6d61d1' 
  AND token = 'tA5C1+wkTEFX2jmN9Z7gJySg8U3ELoaryS9QDlehCQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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