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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11361dcbf0dac2467e0de33e48af5d8a0e52b54c666f8dbd29f05d4d85a1d84e' 
  AND token = 'Hhs0Z9se4glpHqqTDa9ymkhPzH8PS4LwoPJsz/dDSOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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