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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07b33b0e5c65d2a4ef7e2ea20c086985103fb73c0889a34373b6c133c926d790' 
  AND token = '2HJB5KE6XOWIxaR/F9UUVigLFG+1CNgA/INoVIbOFGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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