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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11e97893d7cb73728e93e6dd894d7deb6b0b99bc2f86107f4e7ea8e3c092503b' 
  AND token = 'quEe44Pft45YHeb9dGErLMmCzFbu5yuYL8gXeI35HAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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