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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22d10244fb4cfc87e492aefe236a1c4558cb759846de6ed88b4dc9e26e2b412e' 
  AND token = 'ncEKItPFdovFeFrAOuGxMU37U0wF6hND2UxfVaUg5p4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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