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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6e383c87b86e2c1352b01a93183393fdae7cca05dd3c698eb6fbfd01f3ee173' 
  AND token = 's0i5Pm6lip012RbaEC7ebx9QoAv6Cl4RwrJHriLOu68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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