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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0133fbad3cc77233e728b2d8b3fb60d9975129b93632cfa1948ee7dbc6fca71e' 
  AND token = 'cEzP7U0t2gjXHYTC5UxbHNYvZAU7tOfsI+ufE009BcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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