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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2e743b11dfcec7e2bfa76c42f006813aa93db4fac4087128f901f466c24a80f3' 
  AND token = '5wroLfnLgTHkl9rcuBi1uWjw8rgmf2etqZ3C9RwIZw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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