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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2eeab67d24094bd4425cfce89de8cace9b8c80e1ded3943cf7f20c3f77c02882' 
  AND token = 'w5jPgO0NA+2bp/KHREx17TK2Xq69xR4n6a0L9miWGKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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