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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48ee4e9993d0824f72a0368956022927e03316d19bb5a70b95a77da2418157f5' 
  AND token = 'eLlSt3PHq5qpasQaaeuBQaQ8iGiZ3mfVcgBklU0H9w4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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