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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06477077d9a00afcf1da5b801febb29083e7184270468c07f781c936534a1eeb' 
  AND token = 'eQZ5UIpMFBpbDmUjhR2VGbN3arzw9K1tNR/gmnZ64OQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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